130 CYNIPIDOrS GALLS AXD HALL-WASPS— ASHME AD. vol.xis. 



half the leugth of the abdomen (in T. saltata it is two-thirds as long); 

 while the antenme are but 15-jointed, the third joint being not quite 

 twice as long as the fourtli. Pleura acidulated; scutellum coarsely 

 rugose, with two large, dee]) fove;e at base, separated only by a carina. 



Wings hyaline, tinged with yellow, basal nervure of radial cell arcuate, 

 the areolet distinct, cubital cell open at base. Legs dark red, the pos- 

 terior coxit dusky or black. 



Type.—^o. 308(), I'.S.N.M. 



Described from one specimen, received from Maw J. L. Zabriskie, 

 Nyack, New York, February 6, 1884. The gall made by the fly is 

 unknown. 



Genus CALLIRHYTIS, Forster. 

 32. CALLIRHYTIS VACCINIIFOLI/E new jpecies. 



Gall. — A thin-shelled, globular gall, with a central kernel held in 

 I)lace by radiating filaments and closely resembling the gall produced 

 by A. inanis, Osten-Sacken, but the average size is smaller and tlie 

 color of the gall darker. It measures from half an inch to a little over 

 an inch in diameter and is found on Quereus vacciniifoUa in California. 



(jaUJiij. — Female. Lengtli, 2 to •j.2 mm. Red or brownish red (one 

 specimen has the thorax almost black), antennai and legs brownish 

 yellow, sometimes obfuscated; several terminal joints of the antenna' 

 are dark brown. 



Head closely punctate; thorax almost smooth, the parapsidal grooves 

 sharply defined, complete, a short median groove posteriorly and the 

 groove on the shoulders indistinct; scutellum rugose, the fovea? large, 

 broad, distinct, and separated only by a carina; mesopleura sniooth, 

 ])olished, the triangular piece beneath teguhe alone being punctate. 

 The abdomen is larger than the head and thorax together, the seg- 

 ments ol)li(iue, the second segment occupies about two-thirds of the 

 whole surface and is a little pubescent at sides near the base, impunc- 

 tate, some of the short terminal segments a little dusky; spine of 

 ventral valve rather long, hairy. Wings hyaline, pubescent, the veins 

 pale brown; the vein at base of marginal cell is slightly bent, but not 

 angulate, the marginal cell being very long and narrow, areolet dis- 

 tinct, but the surrounding veins delicate, cubital cell almost closed. 



One of the s]H'cimens is but 2 mm. long and of a uniform brownish- 

 yellow color, but structurally it does not seem to differ from the others. 



Type.— So. 3087, U.S.X.M. 



Four specimens, reared October 1<> and Decend)er 4, 1884, from galls 

 collected by Prof. .1. II. Comstock, at Truckee, California, on Quervus 

 vaccinii/oiia. 



33. CALLIRHYTIS CRASSICORNIS, new species. 



Gall. — A i)eculiar, irregular, somewhat triangulated, hard, finely 

 rugose, blackish seed-like gall, issuing from the twig, most of them 

 being covered with a whitish eillorescence. 



